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Samuel Dunn (died 1794) was a British mathematician, and amateur astronomer. ==Life== He was a native of Crediton, Devonshire. His father died at Crediton in 1744. He wrote in his will: The "schoolhouse" was the place where the "English school" was kept previously to its union with the blue school in 1821. In London, Dunn taught in different schools, and gave private lessons. In 1757, he came before the public as the inventor of the "universal planispheres, or terrestrial and celestial globes in plano", four large stereographical maps, with a transparent index placed over each map, He published an account of their ''Description and Use'', 2nd edition, octavo, London, 1759. From the preface, it appears that in 1758 Dunn had become master of an academy "for boarding and qualifying young gentlemen in arts, sciences, and languages, and for business", at Chelsea. It was at Ormond House,〔 cites: Faulkner, '"Chelsea"', ed. 1829, ii. 211.〕 where there was a good observatory. On 1 January 1760, he made the observation of a remarkable comet;〔 cites: ''Ann. Reg''. iii. 65.〕 other discoveries he communicated to the Royal Society. Towards the close of 1763, he gave up the school at Chelsea, and fixing himself at Brompton Park, near Kensington, resumed once more his private teaching. In 1764 he made a short tour through France.〔 cites: ''Addit. MS. 28536'', f. 241.〕 In 1774, when residing at 6 Clement's Inn, near Temple Bar, he published his excellent ''New Atlas of the Mundane System, or of Geography and Cosmography, describing the Heavens and the Earth. … The whole elegantly engraved on sixty-two copper plates. With a general introduction'', folio, London. About this time his reputation led to his being appointed mathematical examiner of the candidates for the East India Company's service. Under the company's auspices he was enabled to publish in a handsome form several of his more important works. Such were: # ''A New and General Introduction to Practical Astronomy, with its application to Geography … Topography'', octavo, London, 1774. # ''The Navigators Guide to the Oriental or Indian Seas, or the Description and Use of a Variation Chart of the Magnetic Needle, designed for shewing the Longitude throughout the principal parts of the Atlantic, Ethiopic, and Southern Oceans'', octavo, London (1775). # ''A New Epitome of Practical Navigation, or Guide to the Indian Seas, containing (1) the Elements of Mathematical Learning, used … in the Theory and Practice of Nautical affairs; (2) the Theory of Navigation. ..; (3) the Method of Correcting and Determining the Longitude at Sea …; (4) the Practice of Navigation in all kinds of Sailing (with copper plates)'', octavo, London, 1777, and # ''The Theory and Practice of the Longitude at Sea … with copper plates'', octavo, London, 1778; second edition, enlarged, quarto, London, 1786. He also "methodised, corrected, and further enlarged" a goodly quarto, entitled ''A New Directory for the East Indies … being a work originally begun upon the plan of the Oriental Neptune, augmented and improved by Mr. Willm. Herbert, Mr. Willm. Nichelson, and others'', London, 1780, which reached a fifth edition the same year. Dunn was living at 8 Maiden Lane, Covent Garden, in July 1777, but by September 1780 had taken up his abode at 1 Boar's Head Court, Fleet Street, where he continued for the remainder of his life. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Samuel Dunn (mathematician)」の詳細全文を読む スポンサード リンク
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